Paula goes on to urge Mr Trump to recognize climate change and find solutions to it along with other world leaders. "We only have one planet earth," she concludes.
Read her letter below:
According to Kurier.at, Alexander Van der Bellen handed the handwritten letter to Donald Trump during a Meet & Greet reception for all heads of state and government during the UN General Assembly.
Since being shared on September 20, the letter has also found its way to Reddit, where it has been 'upvoted' close to 5,000 times.
In June this year, Mr Trump's decision to back out of the Paris climate agreement had invited widespread criticism.
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